Quote Originally Posted by BLG355 View Post
This is the first performance engine I ever build that didn't have headers. As good as this thing runs I should just upgrade. I started it with the O2 sensor out to try to feel any backpressure, wish I had a gauge. to me, it felt excessive, but with a dynomax super turbo, they do create backpressure. Everything runs so well, maybe it's just too restricted, I have the stock crap y-pipe in there yet too. that should probably go no matter what I do.


BLG
If you want to keep the Y-pipe look, for one from an earlier slip on cat truck, 88-92 I think. They have larger primary tubes, with 3'' collector. Even better than that are the 96-up 3/4-1 ton trucks with large dual pipes back to the muffler, that's what i'm using. The TBI truck manifolds are much better than the cars or even the Vortec trucks.